Maybe what you are looking for is at partners.ovh.com/ If you just want to resell OVH servers. Not exactly sure what it is you want to do. Do you want to become a web host? If so then purchase one of their dedicated servers and add WHM/cPanel to it and start from scratch.
1. Come up with a business plan be sure you know the exact market you want to reach.
2. Compare prices of dedicated servers, management and IP's.
3. Invest in a good control panel and be sure you have knowledge of what your doing.
4. Remember most of the new host coming out now are reselling from OVH also and use SolusVM so offer something that they don't.
Order your services from them and sell it again to your customers under your own name & brand. You'll be providing support services for them and taking care of any needs they might have as well. They will not be interfacing with OVH at all, this will be your responsibility.
I was also wondering how am i able to do, the thing worries me is how i can make that process automatic. I want to go "Pay as you go" service, for example if someone buys a VPS from me, and then i can give it to him, but with all the automatic process with control panel, not letting them know that we are reselling.